Problems reading DVD-R Disc

[Ant2003]

Hi,
I am trying to back up Bruce Almighty on DVD. I have used DVD Shrink and then CloneDVD and managed to burn the DVD but it will only be recoginised in my DVD-RW drive, and will not even load in my DVD drive. It just says no disc in drive.
I am using Bulkpaq DVD 4x, it could be the quality of DVD-Rs but no sure. I havent checked it on any other DVD drives as of yet.

Any suggestions to the problem would be great.
Thanks